Over 750 fiat currencies have existed throughout history, most are dead. But BTC is different.

No fiat currency has survived 100 years with its purchasing power meaningfully intact. The British pound has lost over 99% of its value since 1900. The US dollar has lost roughly 96% since the Federal Reserve was established in 1913. The German mark, the French franc, and the Italian lira were all replaced entirely. Of the 750+ fiat currencies that have ever existed throughout history, the majority are now defunct, ended by hyperinflation, war, regime change, or deliberate debasement.

Bitcoin offers a structurally different model: a hard cap of 21M coins, enforced by code that cannot be altered without consensus from tens of thousands of globally distributed node operators. No committee sets the monetary policy. No central bank can expand the supply.

Whether that's desirable depends on your macro views. Flexible monetary policy advocates argue that you need the ability to expand and contract the supply to manage economic cycles. Fixed supply advocates argue you're just trading short-term stability for long-term erosion that has destroyed every fiat regime in history.

The experiment is still ongoing to answer the question: Over a 100-year horizon, does a fixed mathematical protocol preserve value more reliably than a century of consistent political discipline across all major governments?

Source: https://www.coingecko.com/learn/bitcoin-100-year-survival-thesis